Add flock-based locking to chroots

This prevents accidents when chroots are shared between multiple users.

1 files changed, 13 insertions, 0 deletions

diff --git a/archbuild b/archbuild
index 7e8c456..9dd4888 100755
--- a/archbuild
+++ b/archbuild
@@ -36,6 +36,19 @@ fi
 
 if ${clean_first} || [ ! -d "${chroots}/${repo}-${arch}" ]; then
 	echo "Creating chroot for [${repo}] (${arch})..."
+
+	for copy in ${chroots}/${repo}-${arch}/*; do
+		[[ -d $copy ]] || continue
+		echo "Deleting chroot copy '$(basename "${copy}")'..."
+
+		# Lock the copy
+		exec 9>${copy}.lock
+		flock 9
+
+		rm -rf ${copy}
+	done
+	exec 9>&-
+
 	rm -rf ${chroots}/${repo}-${arch}
 	mkdir -p ${chroots}/${repo}-${arch}
 	setarch ${arch} mkarchroot \